~/dnsniffer/issuers/istec·rank #117
▸ How many domains does ISTEC secure?
181
active domains whose current TLS certificate was issued by ISTEC, as of - 0.00% of all attributed domains.
# rank #117 of all CAs ▼ 8 in 30d# all records held: 181# subdomains: 0# intermediates: 1# Spain
~/issuers/istec/history·active domains
181
domains secured by ISTEC on 2026-10-15 · ▲ +52 (+40.31%) since 2025-06-30
# y-axis starts at 111.12, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.
# change over time
30 days
▼ -24.58%
-59 domains
90 days
▼ -34.89%
-97 domains
1 year
▼ -32.46%
-87 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| ACCV RSA1 TLS | Spain | 181 |
# faq
- ? How many domains does ISTEC secure?
- ISTEC is the certificate authority for 181 active domains as of October 15, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is ISTEC gaining or losing market share?
- The number of domains secured by ISTEC has shrunk by 32.46% over the last year (-87 domains).
- ? Which intermediate CAs does ISTEC sign from?
- We have seen 1 intermediates under ISTEC, the busiest being “ACCV RSA1 TLS” with 181 domains. The full list, with per-intermediate counts, is on this page.
- ? Where does this number come from?
- DNSniffer ingests Certificate Transparency logs continuously and records the issuer of the most recent certificate seen for each domain, then snapshots the per-issuer count once a day. It measures how much of the live web a CA currently secures, not how many certificates it has issued over its lifetime.